You said: "if you're doing PoS you're not in a permissionless blockchain anymore (since you need to buy staking power)."
So my point was that having to buy stake doesn't make Ethereum's proof-of-stake any more permissioned than proof-of-work, where you have to buy mining equipment.
So my point was that having to buy stake doesn't make Ethereum's proof-of-stake any more permissioned than proof-of-work, where you have to buy mining equipment.